Valve



G. BIRKERY.

VALVE. I

Patented Mar. 11, 1890..

(No Model.)

UNITED STATES PATENT OFFICE.

CORNELIUS BIRKERY, OF HARTFORD, CONNECTICUT.

VALVE.

SPECIFICATION forming part of Letters Patent No. 423,118 dated March 11,1890.

Application filed April 8, 1889. $e1'ial No. 306,328. (No model.)

To all whom it may concern:

Be it known that I, CORNELIUS BIRKERY, of Hartford, Connecticut, haveinvented certain new and useful Improvements in Valves, of which thefollowing is a specification.

My invention relates to the class of valves used for water-closets andcisterns, which are automatically opened and closed by the vary inglevels of water in a tank or fioat-chamber.

The object of the invention is to construct a valve of this class whichis so balanced that under widely-differing pressures it will operateeasier, surer, and with less hammering than prior valves of this class.

Referring to the accompanying drawings, Figure 1 is a sectional view ofa tank, show ing the valve in side elevation. Fig. 2 is a view incentral longitudinal section of the valve on enlarged scale. Fig. 3 is across section of the valve on plane denoted by the broken line so 00 ofFig. 2. Fig. l is a detail side view of the valve-disks.

I11 the drawings, a indicates a tank; I), an automatic valve adapted tokeep the water in the tank at the desired level, and c an ordinaryoutlet for emptying the tank of water. The casing b of the valve is castto shape with a cylindrical body having a threaded hub 61 at one end,whereby the valve may be attached to a water pipe. A channel f is formedfrom the inlet e through the hub d to the opening g into the chamber ginthe opposite end of the casing. The front end of the cylindrical hub h,which projects into the chamber g, forms the disk-seat, and the openingthrough this hub leads from the chamber g into the outlet-spout t'. Thevalvedisks m and n are connected together and held with a space betweenthem by rods 0, the outside diameter of these disks being equal to thediameter of the chamber g. The disk on extends entirely across thechamber. Its packing makes a water-tight joint with the walls of thechamber, and when it moves up and seats itself against the front end ofthe hub h the passage of water through the valve is stopped, while thedisk at has a central opening which fits the hub h, the packing of thisdisk making a water-tight joint with the walls of the chamber g, alsowith the hub 7t. A spindle Z is secured to the disk m, and afterextending through the cap j and stuffing box rise and fall, andconsequently adjust the opening and closing of the valve as the level ofthe water in the tank changes. tis an escape for any water that leaksback of the packing of the disk at, and t is an escape for water whichleaks past the packing of the disk m. These small openings 25 and 25'also permit air to slowly enter into or escape out of the chambers backof the disks, so that air-cushions are formed which retard themovementof the disks and prevent them from any quick and jerky movementin opening or closing, thus preventing water-hammer.

W'ater entering the passage 6 traverses the channel f through theopening 9' into the chamber g, between the disksmand n. When water isdrawn from the tank and the float drops, the disk m is pulled away fromits seat against the end of the hub h, and Water passes through the hub77. and spout c' into the tank until the float is raised sufficiently toforce the disk m against its seat. It will be noticed that thewater-pressure upon the disks 1%. and n is in opposite directions, whichso balances the pressure that the disks are easily moved, but a fewounces of weight are required to open the valve, and but a small floatis necessary to close it, which operations, also on account of thisbalancing, are free from the usual hammering. Another advantage residesin the fact that the disks move in closing in the direction of thedeparting water, and dirt and grit will not become caught be tween thedisk m and its seat, the balancing of the disks and the air-cushionsback of them making the disks move slowly in closing and allow theescaping water to draw away any sediment liable to be caught between theface of the disk and the end of the hub. This is not so where a valvecloses suddenly or is pulled up against the force of the current.

The invention is illustrated and described in connection with a tank,but obviously it can be used in connection with cisterns and.

water-closets without departing from the invention.

I claim as my invention- 1. In a valve, a casing having an inlet, adisk-chamber, a hub projecting into the diskchamber, and an outlet, incombination with a disk-packing and a ring-packing located in thedisk-chamber upon opposite sides of the inlet-opening, with anair-chamber back of them, the disk being adapted to close the outlet andthe ring to retard the movement of the disk, and means for automaticallyopening and closing the valve, substantially as specified.

2. In a valve, a casing having an inlet, a channel from the inlet to anopening into the disk-chamber, a hub projecting into the diskchamber,and an outlet spout, in combination with a disk adapted to seat itselfagainst the end of the hub and a ring connected to the disk adapted toslide upon the hub,'and'a spindle, lever, and float for automaticallyopening and closingv the valve, substantially as specified.

3. A valve-packing consisting of a disk and a ring-piston rigidlyconnected with a space between them, said disk reciprocating in thedisk-chamber of a valve on one side of the inlet and adapted to open andclose the outlet, said piston being mounted on the outlethub andreciprocating in the disk-chamber on the opposite side of the inlet toregulate the motion of the disk, substantially as specified.

CORNELIUS BIRKERY. Witnesses:

HARRY R. WILLIAMS, A. B. JENKINS.

